Fertilizer Technology, Ammoniation of Triple Superphosphate Fertilizers with Gaseous Ammonia and with Nitrogen Solutions

Increasing material, processing, and distribution costs have raised superphosphate prices to a point where many farms cannot support the costs of meeting maintenance phosphate requires men& Alternatives to superphosphate, particularly those that have lower processing costs and contain more P, may offer a solution to the problem provided they are agronomically as effective. Phosphate rock may indeed be such an alternative. Preliminary results from a series of five trials in Northland show that on soils of moderate P fertility, with low phosphate retention (PR) and high pH (5.9.6.0), initial pasture growth responses to rock phosphates are smaller than those from single or triple superphosphate. On one soil of higher PR and lower pH, the differences in yield between the rock-phosphates and the super. phosphates were smaller. Of the rock phosphates tested, Sechura and North Carolina (unground and ungranulated) tended to be more effective than ground and granulated Chatham Rise phosphorite. The effect on production of applying fertilisers once every three years, as opposed to annual applications is being investigated using triple superphosphate and Sechura phosphate rock. After two years, production levels appear largely unaffected by differences in application frequency. A comparison of locally-produced superphosphate with a reference standard showed that both performed similarly, indicating that the local product was of satisfactory quality.

Download Full-text

POTENSI HASIL JAGUNG MANIS (Zea mays saccharata, Sturt) DENGAN PEMBERIAN PAKET TEKNOLOGI PUPUK DAN ZAT PENGATUR TUMBUH

Jurnal BiBieT ◽

10.22216/jbbt.v2i1.2763 ◽

2017 ◽

Vol 2 (1) ◽

pp. 37

Author(s):

Surtinah Surtinah

Keyword(s):

Zea Mays ◽

Sugar Content ◽

Environmental Design ◽

Randomized Design ◽

The Difference ◽

Difference Test ◽

Treatment Design ◽

Fertilizer Technology

Tujuan penelitian adalah untuk mengetahui paket teknologi yang memberikan produksi jagung manis varietas Master Sweet yang terbaik. Rancangan Perlakuan yang diuji adalah paket teknologi pupuk Bio Extrim dan ZPT Hormax yang terdiri dari delapan taraf, dan rancangan lingkungan yang digunakan adalah rancangan acak lengkap dengan uji beda rata-rata perlakuan DMRT pada p 0.5. Hasil penelitian memperlihatkan bahwa paket teknologi dengan pemberian Hormax tanpa Bio Extrim menghasilkan kadar gula yang terbaik. The aim of the research was to find out the technology package that gives the best Sweet Sweet varieties production. The treatment design tested was the Bio Extreme fertilizer technology package and the Hormax ZPT consisting of eight levels, and the environmental design used was a complete randomized design with the difference test of the average DMRT treatment at p 0.5. The results showed that the technology package with Hormax without Bio Extreme resulted in the best sugar content

Download Full-text

Kinetics of the reaction between solid terephthalic acid and gaseous ammonia

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19733561 ◽

1973 ◽

Vol 38 (12) ◽

pp. 3561-3570 ◽

Cited By ~ 1

Author(s):

J. Smolík ◽

J. Vítovec

Keyword(s):

Terephthalic Acid ◽

Gaseous Ammonia ◽

Kinetics Of

Download Full-text

Tailoring Properties of Resol Resin-Derived Spherical Carbons for Adsorption of Phenol from Aqueous Solution

Molecules ◽

10.3390/molecules26061736 ◽

2021 ◽

Vol 26 (6) ◽

pp. 1736

Author(s):

Karol Sidor ◽

Tomasz Berniak ◽

Piotr Łątka ◽

Anna Rokicińska ◽

Marek Michalik ◽

...

Keyword(s):

Surface Composition ◽

Micropore Volume ◽

Gaseous Ammonia ◽

Poly Vinyl Alcohol ◽

Clear Correlation ◽

Hno3 Solution ◽

Synthesis Conditions ◽

Adsorption Of Nitrogen ◽

Oxygen Groups ◽

Size Of Particles

The polycondensation of resorcinol and formaldehyde in a water–ethanol mixture using the adapted Stöber method was used to obtain resol resins. An optimization of synthesis conditions and the use of an appropriate stabilizer (e.g., poly(vinyl alcohol)) resulted in spherical grains. The resins were carbonized in the temperature range of 600–1050 °C and then chemically activated in an aqueous HNO3 solution, gaseous ammonia, or by an oxidation–reduction cycle (soaking in a HNO3 solution followed by treatment with NH3). The obtained carbons were characterized by XRD, the low-temperature adsorption of nitrogen, SEM, TGA, and XPS in order to determine degree of graphitization, porosity, shape and size of particles, and surface composition, respectively. Finally, the materials were tested in phenol adsorption. The pseudo-second order model perfectly described the adsorption kinetics. A clear correlation between the micropore volume and the adsorption capacity was found. The content of graphite domains also had a positive effect on the adsorption properties. On the other hand, the presence of heteroatoms, especially oxygen groups, resulted in the clogging of the pores and a decrease in the amount of adsorbed phenol.

Download Full-text